Metro turns to green for power saving

With its electricity bill responsible for nearly 15 per cent of the annual ordinary working expenses, Metro Railway is turning to non-conventional sources of power to bring down costs. After Mumbai, Kolkata is the most expensive, so far as power tariff charged is concerned. Metro Railway purchases power from CESC at `7.20 per unit and consumes 300,000 units per day. While the Mumbai metro pays `8.91 per unit, the rates are `6.10 and `4.80 in Delhi and Bengaluru respectively. ICoal Blocksn addition to this, larger solar power plants have been planned on roofs. The two 50kWp plants will be installed at Dumdum and Noapara in 2016-17.